Tips for getting traffic to Google Play App for free or cheaply ?

Hey guys I’m new to this whole app thing, I recently Just uploaded my first Android game app. But now I’m trying to figure out how to increase traffic to the app, what exactly are the biggest factors for ASO now? But also is it possible to rank Google Play pages on Google with building backlinks ? I also heard backlinks help with ASO is that true ?

I was wondering also if anyone thinks it’s worth it to buy social media posts on Fiverr or somewhere else driving traffic to your Google Play link does this work very well ?

But I’m open to hearing about any other free/cheap opportunities to promote Android Apps and increase traffic.

Thanks guys